Conspicuously, NetBSD 3.0.0 is not mentioned -- only newer NetBSD versions. I suspect this is the point of your post.

One question which needs to be asked is why not upgrade NetBSD to a more recent version?

Poking about the archives for the netbsd-users@ mailing list indicates that Perl 5.8.8 was the version synchronized with NetBSD 3.1.

There are a number of collateral questions you may ask in return which I will not be able to answer given limited experience with NetBSD. Your best bet at getting an informed answer is to post to the pkgsrc-users@ or netbsd-users@ mailing lists where the readership is people more deeply involved with the NetBSD community. Information on subscribing can be found at the following: